I want to take high speed shots. My problem is I don't want to buy an expensive flash, so I thought let me make a sound activated shutter. In other words the moment their is a sound my camera takes a picture. After spending hours on the internet I was only able to find circuits that give me and output of 400 volts. http://photography-on-the.net/forum/showthread.php?t=211988" Yes I do know that all of those are meant for flashes but found a way to that output into my camera, I just can't have 400 volts coming out of their.